Support PEP 600

[mattip]

I am interested in getting PEP 600 and general manylinux_X_Y support out, since it turns out manylinux2014 limits us to glibc2.17, and NumPy has found that many trigonometric functions are inaccurate in that glibc. Also, the aarch64 gcc compiler in manylinux2014 has a bug that was fixed upstream but it seems will take quite some time to percolate out into the image. xref numpy/numpy#15763, numpy/numpy#7518, pypa/manylinux#494.

I am not sure how to do this and still respect the Package Installers section of the PEP. Any thoughts, especially in light of PR gh-262?

[brettcannon]

In general the changes are probably going to be:

1. Create a generator that yields all glibc versions from the current version on down to 2.5 where manylinux1 started
2. Have that generator also emit the old manylinux tags at the right place to match what PEP 600 says they are now aliases for
3. Also respect the new _manylinux module semantics when generating tags
4. Update the rest of the code to use the new function

[brainwane]

I think there needs to be a tracking issue for full rollout and I asked about that in Discourse just now.

[mattip]

Does the tracking issue belong in pypa/manylinux ?

[mattip]

Closing, thanks

[brainwane]

Thanks @mattip - pypa/manylinux#542 will be a good place for tracking this progress. And thank you for your work!